Dr. Michael Rieder wants it made clear that cannabis is not a side-effect free, cure-all. The London, Ont., pediatrician has had many children referred to him by doctors who know Rieder wrote the Canadian Paediatric Society’s position statement on cannabis use and aren’t sure whether to prescribe. The conversations, Rieder says, are rather interesting. “The families usually come in with a certain set of ideas,” he says. “Medical cannabis is imbued with a certain mythological…